According to the U.S. Environmental Protection Agency (EPA), about one-quarter of all new vehicles sold today meet the 2016 federal emissions standard, which include a 35.5-mpg average for passenger vehicle fleets.

Jeff Alson, senior policy advisor at the EPA’s Office of Transportation and Air Quality noted that nearly 90 models sold today either meet the 2016 emissions targets, or could meet them with air conditioning improvements and no powertrain improvements. Half of the vehicles today that can meet the 2016 requirements run on gasoline, though none of those meet the goal set for 2025.

The 2025 emissions standards, which includes a 54.5-mpg rating average for passenger fleet vehicles, are met by 25 current models, all of which are hybrids, plug-in hybrids, electric vehicles, or fuel-cell vehicles.

Of note, Corporate Average Fuel Economy (or CAFE) numbers do not, however, reflect numbers advertised by automakers. Instead, the CAFE ratings can be as much as 25 percent higher than what is shown as a vehicle’s official fuel economy. For more on the CAFE vs EPA mpg split, see here.

Experts believe that gasoline engines will continue to reign supreme until 2021, thanks to direct injection and turbocharging technology, but electrification will play a valuable role for automakers to achieve the 2025 goal.